Physics Letters B最新文献

{"title":"Non-flat universe with Tsallis holographic dark energy","authors":"A.V. Astashenok,&nbsp;A.S. Tepliakov","doi":"10.1016/j.physletb.2025.139826","DOIUrl":"10.1016/j.physletb.2025.139826","url":null,"abstract":"<div><div>The cosmological evolution of non-flat universe filled with general Tsallis holographic dark energy is considered. We assumed that the density of the holographic component is defined as <span><math><mrow><mo>∼</mo><msup><mi>L</mi><mrow><mn>2</mn><mi>γ</mi><mo>−</mo><mn>4</mn></mrow></msup></mrow></math></span> where <span><math><mi>γ</mi></math></span> is the nonadditivity parameter and <span><math><mi>L</mi></math></span> is the length of the event horizon. The influence of possible interaction between dark matter and holographic dark energy is investigated. We also considered asymptotic evolution of universe from an early matter dominated epoch and established the existence of de Sitter attractor for <span><math><mrow><mi>γ</mi><mo>&lt;</mo><mn>1</mn></mrow></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139826"},"PeriodicalIF":4.5,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The light neutralino dark matter in the generalized minimal supergravity (GmSUGRA)","authors":"Imtiaz Khan ,&nbsp;Waqas Ahmed ,&nbsp;Tianjun Li ,&nbsp;Shabbar Raza ,&nbsp;Ali Muhammad","doi":"10.1016/j.physletb.2025.139844","DOIUrl":"10.1016/j.physletb.2025.139844","url":null,"abstract":"<div><div>We investigate the Higgs/Z poles solutions for the Higgsino mass parameter, <span><math><mrow><mi>μ</mi><mo>&gt;</mo><mn>0</mn></mrow></math></span> and <span><math><mrow><mi>μ</mi><mo>&lt;</mo><mn>0</mn></mrow></math></span> scenarios. In the framework of Generalized Minimal Supergravity (GmSUGRA), we consider the constraints from Higgs measurements, B-physics observables, LEP limits, and the <em>Planck</em> 2018 relic density bounds, together with the results from direct detection dark matter experiments, including <span>PandaX-4T</span>, <span>XENON-1T</span>, <span>PICO-60</span>, and LUX-ZEPLIN (LZ). Our study indicates that the latest experimental constraints from the LHC and LZ Collaborations exclude the light Higgsinos in the Z and H pole regions for the <span><math><mrow><mi>μ</mi><mo>&gt;</mo><mn>0</mn></mrow></math></span> case. Interestingly, for the <span><math><mrow><mi>μ</mi><mo>&lt;</mo><mn>0</mn></mrow></math></span> case, a very light Higgsinos can still be consistent with the current constraints from the electroweakino searches and LZ experiment in the <span><math><mi>Z</mi></math></span> and <span><math><mi>H</mi></math></span> poles. Consequently, the <span><math><mrow><mi>μ</mi><mo>&lt;</mo><mn>0</mn></mrow></math></span> case appears more promising and thus requires the dedicated efforts to make definitive conclusions about their current status from the experimental Collaborations. In this framework, our findings indicate a deviation of up to <span><math><mrow><mn>2</mn><mi>σ</mi></mrow></math></span> from the central value of <span><math><mrow><msub><mi>a</mi><mi>μ</mi></msub><mo>≡</mo><msub><mrow><mo>(</mo><mi>g</mi><mo>−</mo><mn>2</mn><mo>)</mo></mrow><mi>μ</mi></msub><mo>/</mo><mn>2</mn></mrow></math></span>, resonating with the experimental results reported by CMD and BDM.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139844"},"PeriodicalIF":4.5,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144924365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"α-attractor inflation modified by GUP in light of ACT observations","authors":"Hana Heidarian,&nbsp;Milad Solbi,&nbsp;Soma Heydari,&nbsp;Kayoomars Karami","doi":"10.1016/j.physletb.2025.139833","DOIUrl":"10.1016/j.physletb.2025.139833","url":null,"abstract":"<div><div>Here, the <span><math><mi>α</mi></math></span>-attractor inflation is investigated within a framework incorporating a minimal measurable length, as implemented by the Generalized Uncertainty Principle (GUP). The GUP modifications to the Friedmann equations and cosmological perturbation parameters are employed to assess the model observational viability against the Atacama Cosmology Telescope (ACT) data. Our results indicate that in the <span><math><mrow><mi>r</mi><mo>−</mo><msub><mi>n</mi><mi>s</mi></msub></mrow></math></span> plane, the predictions of the standard <span><math><mi>α</mi></math></span>-attractor model (<span><math><mrow><mi>β</mi><mo>=</mo><mn>0</mn></mrow></math></span>) lies near the <span><math><mrow><mn>2</mn><mi>σ</mi></mrow></math></span> boundary of joint observations. More interestingly enough is that in the presence of GUP effect, the predictions of the model for the GUP parameter <span><math><mrow><mi>β</mi><mo>≳</mo><mi>O</mi><mo>(</mo><msup><mn>10</mn><mn>13</mn></msup><mo>)</mo></mrow></math></span> shifts into the <span><math><mrow><mn>68</mn><mspace></mspace><mo>%</mo></mrow></math></span> CL interval. This value for <span><math><mi>β</mi></math></span> is in well agreement with upper bounds on the GUP parameter deduced from cosmological analysis as well as quantum and gravitational experiments.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139833"},"PeriodicalIF":4.5,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144924366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Timelike entanglement and central charge for quantum BTZ black holes","authors":"Dibakar Roychowdhury","doi":"10.1016/j.physletb.2025.139846","DOIUrl":"10.1016/j.physletb.2025.139846","url":null,"abstract":"<div><div>We compute holographic timelike entanglement entropy for quantum BTZ black holes in a Karch-Randall braneworld scenario. These black holes are exact solutions of massive 3d gravity on the brane and are conjectured to be dual to thermal states in 2d defect CFTs, living at the interface of the brane and the boundary of the bulk <span><math><mrow><mi>A</mi><mi>d</mi><msub><mi>S</mi><mn>4</mn></msub></mrow></math></span>. Our analysis reveals an interesting relation between the tEE and the central charge pertaining to the dual CFT, which receives nontrivial corrections due to quantum backreaction effects on the Karch-Randall brane, which is explored non-perturbatively.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139846"},"PeriodicalIF":4.5,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phases in WLZZ matrix models","authors":"A. Mironov ,&nbsp;A. Oreshina ,&nbsp;A. Popolitov","doi":"10.1016/j.physletb.2025.139845","DOIUrl":"10.1016/j.physletb.2025.139845","url":null,"abstract":"<div><div>We discuss the space of solutions to the Ward identities associated with the WLZZ models. We mostly concentrate on the case of these models described by a two-matrix model with the cubic potential in one of the matrices. We study how this space of solutions can be described by the freedom in choosing integration contours in the matrix integral.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139845"},"PeriodicalIF":4.5,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144924367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excited states from ADAPT-VQE convergence path in many-body problems: Application to nuclear pairing problem and H4 molecule dissociation","authors":"Jing Zhang,&nbsp;Denis Lacroix","doi":"10.1016/j.physletb.2025.139841","DOIUrl":"10.1016/j.physletb.2025.139841","url":null,"abstract":"<div><div>A quantum computing algorithm is proposed to obtain low-lying excited states in many-body interacting systems. The approximate eigenstates are obtained by using a quantum space diagonalization method in a subspace of states selected from the convergence path of the ADAPT-VQE (adaptive derivative-assembled pseudo-Trotter Ansatz variational quantum eigensolver) towards the ground state of the many-body problem. This method is shown to be accurate with only a small overhead in terms of quantum resources required to get the ground state. We also show that the quantum algorithm might be used to facilitate the convergence of the ADAPT-VQE method itself. Successful applications of the technique are made to like-particle pairing as well as neutron-proton pairing. Finally, the <span><math><msub><mi>H</mi><mn>4</mn></msub></math></span> molecule’s dissociation also illustrates the technique, demonstrating its accuracy and versatility.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139841"},"PeriodicalIF":4.5,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144924392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Traversable wormhole for string, but not for particle","authors":"Hun Jang ,&nbsp;Minkyoo Kim ,&nbsp;Hocheol Lee ,&nbsp;Jeong-Hyuck Park","doi":"10.1016/j.physletb.2025.139837","DOIUrl":"10.1016/j.physletb.2025.139837","url":null,"abstract":"<div><div>We propose a Lorentzian wormhole geometry characterized by a closed string massless sector with nontrivial <span><math><mi>H</mi></math></span>-flux and a scalar dilaton. In the string frame, the dilaton exhibits a negative kinetic term, enabling the existence of the wormhole. The geometry consists of three distinct regions. The middle region contains the throat, and its boundaries with the other two regions form non-Riemannian two-spheres, where a fundamental string becomes chiral, akin to a non-relativistic string. While point-particle geodesics are complete within each region and non-traversable across regions, strings perceive the geometry differently, allowing a chiral string to traverse freely.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139837"},"PeriodicalIF":4.5,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lattice simulation of nucleon distribution and shell closure in the proton-rich nucleus 22Si","authors":"Shuang Zhang ,&nbsp;Serdar Elhatisari ,&nbsp;Ulf-G. Meißner ,&nbsp;Shihang Shen","doi":"10.1016/j.physletb.2025.139839","DOIUrl":"10.1016/j.physletb.2025.139839","url":null,"abstract":"<div><div>The proton-rich nucleus <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si is studied using Nuclear Lattice Effective Field Theory with high-fidelity chiral forces. Our results indicate that <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si is more tightly bound than <span><math><msup><mrow></mrow><mn>20</mn></msup></math></span>Mg, thereby excluding the possibility of two-proton emission. The <span><math><mrow><mi>Z</mi><mo>=</mo><mn>14</mn></mrow></math></span> shell closure in <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si is investigated through the evolution of the <span><math><msup><mn>2</mn><mo>+</mo></msup></math></span> state in the neighboring nuclei. We then focus on the charge radius and spatial distribution information of <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si, considering the novel phenomena that may emerge due to the small two-proton separation energy and the shell closure. We present the distribution of the 14 protons and 8 neutrons obtained from our lattice simulation, revealing insights into the spatial arrangement of the nucleons. Moreover, the spatial localization of the outermost proton and neutron suggests that <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si is a doubly magic nucleus. Furthermore, we develop the pinhole method based on the harmonic oscillator basis, which gives insight into the nuclear structure in terms of the shell model picture from lattice simulations. Our calculated occupation numbers support that <span><math><mrow><mi>Z</mi><mo>=</mo><mn>14</mn></mrow></math></span> and <span><math><mrow><mi>N</mi><mo>=</mo><mn>8</mn></mrow></math></span> are the shell closures and show that the <span><math><mrow><mi>π</mi><mn>1</mn><msub><mi>s</mi><mrow><mn>1</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span> orbital component is minor in <span><math><msup><mrow></mrow><mn>22</mn></msup></math></span>Si.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139839"},"PeriodicalIF":4.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144901876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The ANC of 16O states from 7Be + 12C α-transfer reaction to study 12C(α,γ)16O","authors":"K. Kundalia ,&nbsp;D. Gupta ,&nbsp;Sk M. Ali ,&nbsp;R. Mitra ,&nbsp;Swapan K. Saha ,&nbsp;O. Tengblad ,&nbsp;A. Perea ,&nbsp;I. Martel ,&nbsp;J. Cederkall ,&nbsp;A.M. Moro","doi":"10.1016/j.physletb.2025.139836","DOIUrl":"10.1016/j.physletb.2025.139836","url":null,"abstract":"<div><div>We measured the angular distributions for theC(Be,He)O transfer reaction at 35 MeV leading to several excited states ofO. The angular distribution of the ground state ofO was measured for the first time in this reaction. The corresponding Asymptotic Normalization Coefficients (ANC) of all the observed states were determined. The ANC of ground state, 6.92 MeV (2<span><math><msup><mrow></mrow><mo>+</mo></msup></math></span>) and 7.12 MeV (1<span><math><msup><mrow></mrow><mo>−</mo></msup></math></span>) subthreshold states ofO obtained from this work are utilized to determine the astrophysical <span><math><mi>E</mi></math></span>1 and <span><math><mi>E</mi></math></span>2 <span><math><mi>S</mi></math></span>-factors of theC(<span><math><msup><mrow><mi>α</mi><mo>,</mo><mi>γ</mi><mo>)</mo></mrow><mn>16</mn></msup></math></span>O reaction in an <span><math><mi>R</mi></math></span>-matrix analysis.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139836"},"PeriodicalIF":4.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144901750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of pion tensor force on alpha clustering in 20Ne","authors":"Zhao Jing Chen ,&nbsp;Bao Yuan Sun","doi":"10.1016/j.physletb.2025.139830","DOIUrl":"10.1016/j.physletb.2025.139830","url":null,"abstract":"<div><div>The nuclear clustering, as a quantum phase transition phenomenon governed by strong interactions, exhibits characteristics that are highly sensitive to the specific features of nuclear forces. Here, we examine how nuclear deformation and tensor forces influence <span><math><mi>α</mi></math></span>-cluster formation in light nuclei. The axially deformed relativistic Hartree-Fock-Bogoliubov model is utilized to investigate the clustering structure of the <span><math><msup><mrow></mrow><mn>20</mn></msup></math></span>Ne nucleus, at both the ground state and the excited state with a superdeformed prolate. The nuclear binding energies and the canonical single particle levels are obtained at different quadrupole deformation, and the role of tensor force embedded in the Fock diagram of <span><math><mi>π</mi></math></span>-pseudovector (<span><math><mi>π</mi></math></span>-PV) coupling is revealed. While the deformation induces level splittings from the degenerate spherical orbits, the pion-exchanged tensor force provides an additional contribution that increases them in the prolate case. Correspondingly, the excitation energy in the superdeformed prolate state is reduced due to the noncentral tensor interaction, leading to a predicted value which is much closer to the referred threshold for the <span><math><mrow><mn>2</mn><mi>α</mi></mrow></math></span> decay mode of <span><math><msup><mrow></mrow><mn>20</mn></msup></math></span>Ne. Possible <span><math><mi>α</mi></math></span>-clustering configurations in <span><math><msup><mrow></mrow><mn>20</mn></msup></math></span>Ne are then characterized by examining the nucleonic localization function. Although the contribution to the ground state is relatively small, the density profile and nucleonic localization are significantly changed by the pion tensor force for the superdeformed prolate excited state, as further evidenced by characterising the level mixing in the spherical basis components. It is found that the pion tensor force, through its long-range attraction, counteracts cluster dissolution by balancing against Coulomb repulsion. Thus, the results reveal the extra role of the tensor force, correlated to the evolved single-particle levels with nuclear deformation, in the formation, localization and stability of nuclear clustering.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139830"},"PeriodicalIF":4.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144901752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}